Improvement in sewing-machines



E. P. WEST.

Sewing-Machine.

Patented Aug 20,1872.

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ELLIOTT PENDLETON WEST, OF JEESEY CITY, NEW

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 130,674, dated August20, 1872.

SPECIFICATION.

To all whom it may concem:

Be it-known that I, ELLIOTT PENDLETON "VEST, of Jersey City, Hudsoncounty, and

State of New Jersey, have invented a new and useful lmproveinentinSewing-Machines; and I hereby d clare that the following is a full,clear, and exact description thereof, reference being had to theaccompanying drawing making a part of this specification and the lettersof reference marked thereon, in which the same letter represents thesame thing in each figure.

Figure 1 represents a fragmentary portion of a sewing-machine with myimprovements applied thereto. Fig. 2 represents a side elevation ofportions of my improved mechanism for raising the presser-t'oot. Fig. 3is a top view or plan of certain parts.

The object ot' my invention is tolift the presser-foot of asewing-machine While the machine is in operation for a brief period, tofacilitate the turning of the material.

A is the main shaft; B, the lifting-cam; 0, its slot; D, its pin; E, itsspring; F, the cam slide; G, its slot; 1, its guide-slot; J, theguide-screw thereof; K, the slide-bar; H, its pin; L, the lifting-lever;M, its connectingpiece; N N, its adjusting-screws; 0, its stud; P, itspin; R, the presser-foot S, the presserfoot bar; '1, its spring.

The operation is as follows: Revolving main shattArotates cam B, andwhen pressure is applied upon slide-bar Kits pin H works in slot G andmoves cam-slide F, so that cam 13 lifts connecting piece M, which causesthe liftinglever L to turn upon stud O and raise the presser foot bar Sby pin P therein. The presser-foot R will rise from and return, byaction of spring T, upon the material at each revolution of the mainshaft, remaining on while cam B is passing connecting piece M, and nolonger. Releasing the pressure from slide-bar K, spring E returns cam Bto its position out of contact with connecting piece M, and raisesslide-bar K by cam-slide F,-slot G, and pin H.

\Vhat I claim, and desire to secure by Letters Patent, is-

The mechanism shown, consisting of slide bar K, the slotted camslide F,cam B, and lit'tingleverL, constructed and operating, substantially asdescribed, to lift and restore the presser-t'oot of asewing'machinewhile in operation.

ELLIOTT PENDLETON WEST.

\Vitnesses: Q

S. J. GORDON, J oHN.W. RIPLEY.

